• Country
• Great Britain (UK)

• Manufacturer / Brand
• Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB

• Year
• 1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 164530

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 3

• Valves / Tubes
• 354V 41MTL 1821

• Main principle
• TRF with regeneration; 1 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Alternating Current supply (AC) / 200-250 Volt

• Loudspeaker
• Magnetic loudspeaker (reed) generic. / Ø 9 inch = 22.9 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: Pup KB 253 [late] - Kolster Brandes Ltd. KB, K.B.,

• Shape
• Tablemodel, high profile (upright - NOT Cathedral nor decorative).

• Dimensions (WHD)
• 11.5 x 12 x 8.5 inch / 292 x 305 x 216 mm

• Notes

• Oak cabinet. 4 volt valves fitted such as AC/HL, AC/P & 506K. Improved circuit including "Hum Dinger". Price £7.10s.0d. (£7.50 decimal).

  The 253 Pup was designed to operate on 200 to 250v, 40 to 60 c.p.s. But there was also a model, the 253/25,  which was designed for use on 200 to 250v, 25 to 60 c.p.s., presumably this had a larger transformer.

• Net weight (2.2 lb = 1 kg)
• 4.5 kg / 9 lb 14.6 oz (9.912 lb)

• Price in first year of sale
• 8.00 GBP

• Mentioned in
• Radio! Radio!

KB 253 Pup AC late circuit

293 KB

• Documents regarding this model

• Author
• Model page created by Keith Staines. See "Data change" for further contributors.

• Other Models

• Here you find 415 models, 372 with images and 253 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB